Main drive spacer ring structure of shield tunneling machine

Abstract

The utility model belongs to the technical field of shield tunneling machines, and particularly relates to a shield tunneling machine main drive spacer ring structure. The front shield comprises a front shield body and a runway ring, a plurality of threaded blind holes are formed in one end of the front shield body, the other end of the front shield body is detachably connected with a pressing ring, a plurality of distance rings are sequentially arranged in a cavity, lip-shaped sealing rings are arranged between every two adjacent distance rings and between the last distance ring and the pressing ring, and the lip-shaped sealing rings are arranged on the sides, close to the runway ring, of the distance rings. A plurality of through holes matched with the threaded blind holes are formed in the spacer rings, screws are in threaded connection with the interiors of the through holes, and the screws penetrate through the through holes to be connected with the threaded blind holes. The distance ring and the lip-shaped sealing ring are integrally and rigidly connected with the front shield, when the runway ring rotates, only relative movement exists between the lip-shaped sealing ring and the runway ring, the distance ring cannot rotate and the O-shaped sealing strip cannot be damaged no matter how large the friction force is, the damage risk is reduced, and the overall performance of the main drive of the shield tunneling machine is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of shield machines, and in particular relates to a main drive spacer ring structure of a shield machine. Background Art

[0002] At present, the main drive lip sealing ring of the shield machine is mainly separated by a floating spacer ring to form a lubrication chamber. The spacer ring is filled with grease to lubricate the lip sealing ring, and an O-type sealing strip is installed on the outside of the spacer ring to seal the grease.

[0003] However, in the prior art, the spacer ring is not fixed. When the track ring rotates, it produces relative movement with the lip sealing ring. When the friction force is too large, the lip sealing ring may be driven to rotate, and the lip sealing ring may drive the spacer ring to rotate, causing the O-ring sealing strip to wear and damage, and lose the sealing effect. Utility Model Content

[0004] Aiming at the problem in the prior art that the lip sealing ring may drive the spacer ring to rotate, causing the O-type sealing strip to be worn and damaged and lose the sealing effect, the utility model provides a main drive spacer ring structure for a shield machine.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A shield machine main drive spacer ring structure comprises a front shield and a runway ring, an installation cavity is arranged between the front shield and the runway ring, one end of the front shield is arranged with a plurality of threaded blind holes, and the other end is detachably connected with a pressure ring, a plurality of spacer rings are arranged in sequence in the installation cavity from the end with the threaded blind holes to the end with the pressure ring, and a lip sealing ring is arranged between two adjacent spacer rings and between the last spacer ring and the pressure ring, the lip sealing ring is arranged on the side of the spacer ring close to the runway ring, a plurality of through holes matching with the threaded blind holes are arranged on the plurality of spacer rings, a screw rod is threadedly connected in the through hole, and the screw rod passes through the through hole and is connected with the threaded blind hole.

[0007] After adopting this technical solution, a through hole is set on the spacer ring, a threaded blind hole is set on the front shield, several spacer rings are connected and fixed to the front shield by screws, and lip sealing rings are installed between the spacer rings. The spacer ring and the lip sealing ring are rigidly connected to the front shield as a whole. When the runway ring rotates, only the lip sealing ring and the runway ring have relative movement. No matter how large the friction is, the spacer ring will not rotate, and the O-type sealing strip will not be damaged, reducing the risk of damage.

[0008] Preferably, there are four spacer rings, namely the first spacer ring, the second spacer ring, the third spacer ring and the fourth spacer ring, and the sealing strip includes a first O-ring sealing strip and a second O-ring sealing strip, the second spacer ring is provided with two first O-ring sealing strips, and the third spacer ring and the fourth spacer ring are respectively provided with a second O-ring sealing strip.

[0009] After adopting this technical solution, after the spacer ring is fixed to the front shield by the screw, the O-type sealing strip on the outside of the spacer ring is also fixed, so that the O-type sealing strip will not be damaged during the rotation of the runway ring, thereby achieving a sealing effect.

[0010] Preferably, the threaded blind hole is an M12 threaded blind hole, the screw rod is an M12 screw rod, and the diameter of the through hole is 14 mm.

[0011] Preferably, the number and positions of the through holes provided on each spacer ring correspond to the number and positions of the threaded blind holes.

[0012] After adopting this technical solution, it is convenient for the screw rod to pass through the through holes on each spacer ring and connect with the threaded blind hole.

[0013] Preferably, a nut is provided on one end of the screw rod between the pressure ring and the spacer ring, and a gasket is provided between the nut and the side wall of the spacer ring.

[0014] After adopting this technical solution, the screw rod is installed by cooperating with the nut and the gasket.

[0015] Preferably, the pressure ring is connected to the front shield bolt.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0017] 1. A through hole is set on the spacer ring, a threaded blind hole is set on the front shield, several spacer rings are connected and fixed to the front shield by screws, and lip sealing rings are installed between the spacer rings. The spacer ring and the lip sealing ring are rigidly connected to the front shield as a whole. When the runway ring rotates, only the lip sealing ring and the runway ring have relative movement. No matter how large the friction is, the spacer ring will not rotate, and the O-type sealing strip will not be damaged, which reduces the risk of damage, improves the overall performance of the shield machine main drive, reduces the occurrence of main drive failure rate caused by damage to the O-type sealing strip, and effectively solves the problem of downtime caused by failure.

[0018] 2. After the spacer ring is fixed to the front shield by the screw, the O-type sealing strip on the outside of the spacer ring is also fixed, so that the O-type sealing strip will not be damaged during the rotation of the runway ring, thereby achieving a sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0020] Figure 1 It is a front structural schematic diagram of the utility model;

[0021] Wherein: 1-threaded blind hole, 2-first spacer ring, 3-first O-type sealing strip, 4-second spacer ring, 5-second O-type sealing strip, 6-third spacer ring, 7-fourth spacer ring, 8-front shield, 9-gasket, 10-nut, 11-screw, 12-pressure ring, 13-lip sealing ring. DETAILED DESCRIPTION

[0022] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0023] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] Combine the following Figure 1 The utility model is described in detail.

[0025] A shield machine main drive spacer ring structure comprises a front shield 8 and a runway ring 14, wherein an installation cavity is arranged between the front shield 8 and the runway ring 14, wherein one end of the front shield 8 is arranged with several threaded blind holes 1, and the other end is detachably connected with a pressure ring 12, wherein several spacer rings are arranged in sequence in the installation cavity from the end with the threaded blind hole 1 to the end with the pressure ring 12, and lip sealing rings 13 are arranged between two adjacent spacer rings and between the last spacer ring and the pressure ring 12, wherein the lip sealing ring 13 is arranged on the side of the spacer ring close to the runway ring, wherein several through holes matching with the threaded blind holes 1 are arranged on the several spacer rings, wherein the through holes are threadedly connected with screw rods 11, wherein the screw rods 11 pass through the through holes and are connected with the threaded blind holes 1, and wherein the spacer rings are provided with sealing strips.

[0026] In this embodiment, there are four spacer rings, namely the first spacer ring 2, the second spacer ring 4, the third spacer ring 6 and the fourth spacer ring 7. The sealing strip includes a first O-type sealing strip 3 and a second O-type sealing strip 5. The second spacer ring 4 is provided with two first O-type sealing strips 3, and the third spacer ring 6 and the fourth spacer ring 7 are respectively provided with a second O-type sealing strip 5.

[0027] In this embodiment, the threaded blind hole 1 is an M12 threaded blind hole, and there are 8 M12 threaded blind holes. The number of through holes on the first spacer ring 2, the second spacer ring 4, the third spacer ring 6 and the fourth spacer ring 7 is also 8. The screw 11 is an M12 screw, and the diameter of the through holes is 14 mm.

[0028] In this embodiment, the number and positions of the through holes arranged on each spacer ring correspond to the number and positions of the threaded blind holes 1 .

[0029] In this embodiment, a nut 10 is provided on one end of the screw rod 11 disposed between the pressure ring 12 and the spacer ring, and a gasket 9 is provided between the nut 10 and the side wall of the spacer ring.

[0030] In this embodiment, the pressure ring 12 is connected to the front shield 8 by bolts.

[0031] In this embodiment, lubricating oil has been applied to the lip seal ring 13 in advance.

[0032] The specific use method of the utility model is as follows:

[0033] Reference Figure 1, first install the first spacer ring 2 on the front shield 8, and align the 8 14 mm diameter through holes on the first spacer ring 2 with the 8 M12 threaded blind holes on the front shield 8 one by one. After installation, install the lip seal ring 13 coated with lubricating oil; install two first O-type sealing strips 3 on the outside of the second spacer ring 4, and install the second spacer ring 4 and the first O-type sealing strip 3 on the first spacer ring 2 as a whole, and align the 8 14 mm diameter through holes of the second spacer ring 4 with the 8 14 mm diameter through holes of the first spacer ring 2 one by one. After installation, install the lip seal ring 13 coated with lubricating oil; install a second O-type sealing strip 5 on the outside of the third spacer ring 6, and install the third spacer ring 6 and the second O-type sealing strip 5 on the second spacer ring 4 as a whole, and the 8 14 mm diameter through holes of the third spacer ring 6 with the second spacer ring 4 The 8 14 mm diameter through holes are centered one by one, and after installation is in place, install the lip sealing ring 13 coated with lubricating oil; install a second O-type sealing strip 5 on the outside of the fourth spacer ring 7, and install the fourth spacer ring 7 and the second O-type sealing strip 5 as a whole on the third spacer ring 6. The 8 14 mm diameter through holes of the fourth spacer ring 7 are centered one by one with the 8 14 mm diameter through holes of the second spacer ring 6. After installation is in place, install the lip sealing ring 13 coated with lubricating oil; 8 M12 screws 11 are respectively installed through the 8 through holes on the first spacer ring 2, the second spacer ring 4, the third spacer ring 6 and the fourth spacer ring 7, and the screw 11 is fixed in the threaded blind hole 1 of the front shield 8, and 8 gaskets 9 are inserted into the M12 screw 11. Tighten the 8 M12 nuts 10 on the top of the screw 11, and finally install the pressure ring 12.

[0034] Compared with the prior art, the utility model will not allow the spacer ring to rotate and the O-ring sealing strip to be damaged no matter how great the friction force is, thereby reducing the risk of damage, improving the overall performance of the main drive of the shield machine, reducing the occurrence of main drive failure rate caused by damage to the O-ring sealing strip, and effectively solving the problem of downtime caused by failure.

[0035] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A shield machine main drive ring structure, comprising a front shield (8) and a runway ring (14), characterized in that: An installation cavity is provided between the front shield (8) and the runway ring (14). One end of the front shield (8) is provided with a plurality of threaded blind holes (1), and the other end is detachably connected with a pressure ring (12). In the installation cavity, a plurality of spacer rings are sequentially provided from the end provided with the threaded blind hole (1) to the end provided with the pressure ring (12), and a lip sealing ring (13) is provided between two adjacent spacer rings and between the last spacer ring and the pressure ring (12). The lip sealing ring (13) is provided on a side of the spacer ring close to the runway ring (14). Each spacer ring is provided with a plurality of through holes matching the threaded blind holes (1), and the through holes are threadedly connected with screw rods (11). The screw rods (11) pass through the through holes and are connected with the threaded blind holes (1). A sealing strip is provided on the spacer ring.

2. A shield machine main drive ring structure according to claim 1, characterized in that: There are four spacer rings, namely a first spacer ring (2), a second spacer ring (4), a third spacer ring (6) and a fourth spacer ring (7); the sealing strip comprises a first O-type sealing strip (3) and a second O-type sealing strip (5); the second spacer ring (4) is provided with two first O-type sealing strips (3); and the third spacer ring (6) and the fourth spacer ring (7) are respectively provided with one second O-type sealing strip (5).

3. A shield machine main drive ring structure according to claim 2, characterized in that: The threaded blind hole (1) is an M12 threaded blind hole, the screw rod (11) is an M12 screw rod, and the diameter of the through hole is 14 mm.

4. A shield machine main drive ring structure according to claim 2, characterized in that: The number and positions of the through holes arranged on each of the spacer rings correspond to the number and positions of the threaded blind holes (1).

5. A shield machine main drive ring structure according to claim 2, characterized in that: A nut (10) is arranged on one end of the screw rod (11) which is arranged between the pressure ring (12) and the spacer ring, and a gasket (9) is arranged between the nut (10) and the side wall of the spacer ring.

6. A shield machine main drive ring structure according to claim 1, characterized in that: The pressure ring (12) is bolted to the front shield (8).

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